Here are two hypotheses:
1) 2/5ths of a population never reach the abstract thinking stage.
2) The last section of the brain to develop is the judgement portion and it does not finish its development until the age of twenty-five. Â
Is abstract thinking and judgement indications of maturity? I would say yes. Is liking teddy bears, 'Kimba' tees, silly jokes or roleplaying games a symptom of immaturity? I would say probably not.
I used to think that an unfortunate side effect of maturity or age was inflexibility of thought but in reading this thread I realized that inflexibility of thought is quite probably the truest sign of immaturity.
I am not directing that statement at any of the participtants in this thread. I was just reminded of myself when I was a teenager. I remember when I was nineteen of feeling like I knew it all and I felt if I was ninety. This may have had something to do with the fact that I lost 2/5ths of immediate family by the time I was seventeen (a dramatic way of saying I lost my father and brother).
The saddest side of maturity is the ability to see how many of us hopelessly complicate our lives to our detriment.
Sorry for the cheery post.
@Nihilistic Dream - Have you ever seen the movie"The Big Lebowski?" There are some very funny moments involving nihilists.